Pump



I. w. SPRIINK Jan. 21, 1936.

PUMP

Filed June 19, 1953 YINVENTOR [s/mc h/. SPE/A A ATTORN EYS Patented Jan.21, 1936 UNITED STATES PUMP Isaac W. Sprink, Whitehouse, Ohio, assignorto The Logan Gear Company, Toledo, Ohio, a corporation of OhioApplication June 19,

2 Claims.

combination with an improved mounting of impeller shaft or drivingmeans.

The invention contemplates a novel arrangement of pump impeller anddriving means wherein wear of the parts is reduced to a minimum andwherein a compact arrangement of parts may be attained effecting amaterial saving in expense and material and manufacturing economies, aswell as to facilitate easy assemblage and removal of the parts.

I An object of the invention is the provision of a unitary constructionof combined pump impeller seal construction and driving means,

' wherein the parts are so mounted as to prevent undue wear upon thebearings, prolonging the life of the structure, the arrangementincluding a simple and-effective lubricating means for the mechanism. IFurther objects and advantages are within the scope of this inventionsuch. as relate to the arrangement, operation and function of therelated elements of the structure, to various details of constructionand to combinations of parts, elements per se, and to economies ofmanufacture and numerous other features as will be apparent from aconsideration of the specification and a preferred form as embodied in apump of the.

"centrifugal type particularly adapted for circulating fluids, as incirculating the cooling medium of internal combustion engines, but it isto be understood that I contemplate the use of the invention in anyarrangement where the same may be found to be applicable, such as, forexample, in lubrication systems or other installation where it isdesirable to transfer or circulate fluids.

1933, Serial No. 676,436

Referring to the drawing in detail, 10 designates in the embodimentillustrated a manifold of an internal combustion engine which may beintegrally cast with a cylinder block, or in some arrangements aseparate member for conducting cooling fluid medium to or from aradiator or condenser unit (not shown). Secured to the. manifold I0 is acasing or housing ll having a fluid passage I2, the latter being adaptedto be connected to the condenser or radiator unit (not shown) by meansof a flexible tubing 14 which is secured to the pump casing by means ofa band I5 or other suitable retaining means. It is to be understood thatthe housing or casing ll may be made of any suitable material as, forexample, cast iron, sheet metal, composition material or the like,Without departing from the spirit and scope of the invention.

The housing H is preferably formed with two aligned projecting portionsor bosses I! and .l8

in spaced relation, a chamber [9 being arranged between the bossessuitably adapted to contain a supply of lubricant. The projections I!and I8 are centrally bored to receive a shaft 20, one end of the shaftcarrying a pump impeller structure 2 2, the other end of the shaftcarrying a pulley structure or other driving means 23.

The bore in the projection I! of the pump housing is preferably arrangedto receive a bearing bushing 25 which supports shaft 20 adjacent theimpeller 22. In the embodiment illustrated, the pump impeller 22 isbored to snugly fit the end of the shaft 20 and is fixedly securedthereto by means of a pin 21 snugly received in openings in the shaftand impeller hub 28. As illustrated, the pin 21' is a snug fit in thetransverse bore in the impeller hub and shaft and may be splitthroughout a portion of its length so as to be frictionally held inposition, yet may be easily driven out for purposes of repair orreplacement. The bore in projection N3 of the housing H is preferablyslightly larger than the diameter of shaft 20 so that the shaftisnormally out of contact with the bore and supported in a mannerhereinafter described. The driving means includes a pulley structure 23which is provided with a hub portion 29 for supporting the pulley uponshaft 20, a pin 3| similar to pin 21 fixedly securing these elements inposition. Pulley 23 is also preferably provided with a V-shaped groove2| adapted to receive a belt 24 or other suitable driving means,

The sealing arrangement is inclusive of a disc or sealing washer 30, onesurface of which frictionally engages an end of projection H, the

other surface of the washer 30 being engaged by a gasket 32 of cork,rubber or other suitable material inherently resilient or yieldable, thegasket 32 snugly engaging the surface of shaft 20 and rotatabletherewith to prevent seepage of fluid along the shaft into bushing 25.The exterior periphery of gasket, 32 is preferably provided with anannular groove or indentation 33 which accommodates a coiled spring 34or other suitable means to insure snug engagement. of gasket 32 with theshaft 20 by exerting inward pressure upon the gasket. A metallic disc orelement 36 serving as a thrust washer is positioned adjacent gasket 32,the element 36 being in turn engaged by a helical spring or resilientmember 31 surrounding shaft 20 and which also engages the interior endwall of impeller hub 28. By this arrangement, the spring 31 urges gasket32 into close engagement with sealing disc 30, so that the disc 30 ismaintained in resilient frictional contact with an end portion ofprojection H as a sealing surface at all times, which engagementprevents leakage of fluid into bushing 25. The sealing washer 30 may beof a suitable composite material as, for example, fibre, bakelite orphenol condensation product, the latter having been found to producevery satisfactory results, but it is to be understood that any othersuitable materials may be used without departing from the spirit of theinvention. However, by using a phenol condensation product in engagementwith a metallic hearing or boss as a sealing surface, the washer attainsin operation a very smooth finish or polish due to the frictionalcontact with the bearing boss which is found to increase theeffectiveness of the seal.

The washer 30 is provided with a plurality of peripherally extendingdriving projections 39, and the impeller 22 is formed with a similarnumber of spaced longitudinal recesses 4| for receiving the projections39 to cause positive rotation of the Washer 30 with the shaft andimpeller 22. The assembly of washer 30, gasket 32, thrust washer 36 andspring 31 upon shaft 20 is such that all of the elements are containedwithin the impeller 22, facilitating assembly of the arrangement in thepump mechanism.

The exterior of projection or boss I8 is adapted to snugly receive aninner race 43 of an antifriction bearing assembly, which for purpose ofillustration, is provided with a plurality of bearing balls 44, held inspaced relation by means of a ball retainer 42. The outer race 45 of thebearing is snugly received within a central recess 41 in drive member orpulley 23. The bearing races 43 and 45 are preferably press fitted fortight engagement with their respective supporting elements so that theyare fixed therewith. By this arrangement wear on the shaft 20 is avoidedas the pulley 23 is supported adjacent the extension l8 through themedium of the antifriction bearing, the shaft being positioned out offrictional engagement with the bore in boss l8. By this means a drivingshaft of considerably lesser diameter may be utilized than hasheretofore been possible with plain bearing which required comparativelylarge bearing surface to prevent excessive wear. The pulley is alsomaintained in a fixed longitudinal position with respect to the boss l8and longitudinal movement of shaft 20 and impeller 22 issubstantially'eliminated due to this bearing arrangement. The ballbearing arrangement illustrated also serves to absorb any end thrust dueto compression of spring 31, thus eliminating additional means toproperly position the shaft as heretofore employed. The load or stressapplied to the pulley 23 from driving belt 24 is thus effectivelycarried by the boss 18 through the anti-friction bearing structure andthus, a device has been provided which substantially eliminates wearand. minimizes the service replacement of parts.

In order that the structure be properly lubricated, chamber I9 is filledwith a suitable lubricantby means of fitting 53 secured in a wallthereof. The lubricant flows along shaft 20 through the bore in boss 18to lubricate the ball bearings 44 and raceways 43 and 45. A lubricantseal or retainer consisting of a sheet metal annulus is carried by theouter race and houses a sealing washer of suitable material as, forexample, felt which bears against the exterior periphery of the innerrace 43 and prevents the escape of lubricant from the bearing structure.Bearing bushing 25 also receives its lubrication from the chamber I9,the lubricant creeping along shaft 20 to the sealing washer 39.

It is apparent that, within the scope of the invention modifications anddifferent arrangements may be made other than is herein disclosed, andthe present disclosure is illustrative merely, the inventioncomprehending all variations thereof.

What I claim is:

1. In combination, a housing; a lubricant chamber in said housing; ashaft; a plurality of bosses projecting from said chamber havingopenings to accommodate the shaft; 2. pump impeller mounted on the shaftadjacent one of said bosses; fluid sealing means between said impellerand said boss; a driving pulley mounted on the shaft adjacent a secondboss; an anti-friction bearing between said second boss and said pulleyfor supporting said shaft; the opening in said boss adjacent theanti-friction bearing being larger than the shaft to facilitate passageof lubricant from said chamber to the bearing.

2. In combination, a housing provided with a plurality of projections; ashaft; an impeller carried by said shaft and having a recess therein; afluid sealing means within said recess, said sealing means including asealing washer, a cork gasket surrounding said shaft; and a resilientmeans to urge said washer into engagement with one of said projectionsto form a seal; driving means secured to said shaft having a recesstherein for accommodating an anti-friction ball bearing, a secondprojection forming a support for said bearing; the parts being arrangedwhereby the bearing defines the longitudinal position of the shaft and alubricant chamber between said sealing means and said driving means tosupply lubricant to said bearing.

ISAAC W. SPRINK.

